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Which lamp has the highest energy efficiency?

AIncandescent Lamp

BLED Lamp

CCFL

DArc Lamp

Answer:

B. LED Lamp

Read Explanation:

  • LED stands for light emitting diode.
  • LEDs are used as indicator lamps in many devices, and are increasingly used for lighting.
  • These have lower energy consumption, longer lifetime, smaller size, faster switching as compared to other light sources used in our daily life.

Related Questions:

Which of the following method(s) can be used to change the direction of force on a current carrying conductor?

  1. (i) Changing the magnitude of current
  2. (ii) Changing the strength of magnetic field
  3. (iii) Changing the direction of current

    A magnet, when moved near a coil, produces an induced current. Which of the following method(s) can be used to increase the magnitude of the induced current?

    1. (1) Increasing the number of turm in the coil
    2. (2) Increasing the speed of the magnet
    3. (3) Increasing the resistivity of the wire of the coil
      An AC generator works on the principle of?
      സ്ഥിതി വൈദ്യുത ചാർജ്ജിന്റെ സാന്നിധ്യം അറിയാൻ ഉപയോഗിക്കുന്ന ഉപകരണം ഏത് ?

      Which of the following statements is/are true for a current carrying straight conductor?

      1. i) The magnetic field lines are concentric circles with conductor at the centre.
      2. (ii) The strength of the magnetic field increases as we move away from the conductor.
      3. (iii) The direction of magnetic field can be determined using right hand thumb rule.